Donald Trump is facing a growing credibility problem within his own base, as new polling shows his approval rating among his own supporters has taken a sharp dive. The latest Pew Research poll, conducted between August 4-10 among 3,

Trump’s average approval rating for the second quarter of his second term, April 20-July 19, is 40% in Gallup polling, compared to a 39% average in the second quarter of his first term but below second-term averages for every post-World War II president.

The Pew Research Center poll found that Trump’s approval rating has dropped three percentage points over the past two months and is down nine points since shortly after he took office. The poll ultimately found that Trump had a 38% approval rating among all Americans, which is down from the 47% approval rating in January.